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Hybrid OSVs – Remaining Competitive in the North Sea and Gulf of Mexico

Hybrid OSVs – Remaining Competitive in the North Sea and Gulf of Mexico

Indications are that 2018 will see a significant increase in offshore activity as oil & gas prices are forecasted to rise. As Transocean, one of the world’s largest offshore drilling contractors, reported in their Q4 2017 Results earnings call: “This upward price momentum has provided some needed confidence among our customers. Indeed, new 2018 offshore project commitments are forecasted to rise approximately 140% as compared with 2017.”

This confidence is mirrored by what Corvus Energy experienced in 2017—a meteoric 350% increase in order intake from the offshore oil & gas sector compared to 2016. Indeed, the total market for ESSs on offshore support vessels—including platform supply vessels, cable laying vessels, and construction vessels—grew 217% percent. Moreover, just two months into 2018, and it looks like interest will not abate.

Fueling this uptake in Energy Storage Systems (ESSs) is the need for operators of offshore support vessels (OSVs) to improve competitiveness and their bottom line by investing in hybrid technology.

With emissions limits becoming more stringent, and fuel costs on the rise, operators of OSVs are looking to fuel efficiency measures to help them avoid costly alternatives. Further, with an increasing number of customers and regulators mandating emissions control, OSV operators look to hybrid propulsion for a competitive shot at new charters. Hallvard Klepsvik, North Sea Shipping CEO, said this of their decision to hybridize their North Sea Giant subsea construction vessel: “For us, it is important to reduce environmental emissions and modernize the vessel to make it more competitive.”

Corvus Energy leads with 70% market share

Growth of ESSs in this sector has been driven primarily from North Sea offshore operations. But operators in the Gulf of Mexico and other offshore hubs won’t be far behind.

Louisiana-based SEACOR Marine will be the first OSV owner to operate hybrid OSVs in the Gulf of Mexico—four vessels owned and operated by SEACOR and additional vessels owned by their joint venture with COSCO Shipping, SEACOSCO. Read more…
Corvus Energy to Power all Hybrid PSVs in the Gulf of Mexico

Corvus Energy, the supplier for 70% of ESS capacity on OSVs, works with all major hybrid OSV propulsion system integrators.

“We are proud to have been selected as the battery supplier for most of the hybrid OSVs in service today, and are excited that the Gulf of Mexico will soon start to see the environmental benefits achieved in the North Sea,” said says Halvard Hauso, SVP Business Development at Corvus Energy. “The economics of hybridization are now very favorable.”

Proven environmental and economic benefits

In North Sea offshore operations, seven Norwegian ship owners—DOF, Eidesvik Offshore, Havila, North Sea Shipping, Østensø Rederij, Solstad Farstad, and Ugland —have hybrid OSVs in their fleets. In addition, the Netherland’s Fafnir Offshore and Denmark’s NKT also have hybrid offshore vessels serving the North Sea and the Norwegian continental shelf.

“In Norway, we produce oil and gas with half of the CO2 emissions per produced unit compared with the global industry average,” said Arne Sigve Nylund, executive vice president, Development and Production Norway at Statoil, which achieved its target to reduce CO2 emissions on the Norwegian continental shelf (NCS) four years ahead of schedule. Using hybrid OSVs is one of Statoil’s emissions-reducing initiatives. Nylund continues, “We aim to reduce CO2 emissions from the NCS by another 2 million tonnes by 2030.”

The green trend migrates to the Gulf of Mexico, with SEACOR Marine selecting Corvus Energy to supply ESSs for all hybrid OSVs newbuilt and retrofit vessels to date.

We at Corvus Energy are excited to be accelerating the transformation of the marine industry to a cleaner future.

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Scandlines Shares Experiences with Hybrid and Electric Ferry Technology

Scandlines Shares Experiences with Hybrid and Electric Ferry Technology

Scandlines has reduced fuel oil consumption by 40% in the past two decades by implementing numerous green technologies in their four Puttgarden-Rødby ferries. “It’s a never-ending search for fuel savings,” said Fini Hansen, Scandlines’ Technical Superintendent of Fleet Management. “Scandlines is making a significant investment in new green technology that will benefit the people in the areas adjacent to the harbor and beyond in terms of reduced pollution. We invest responsibly in tomorrow’s technology leading towards a greener future.”

These remarks were made at Rostock Ship Machinery Conference (Rostocker Schiffsmaschinerntagung), September 21, 2017 at a presentation entitled, Green Agenda: Scandlines experiences with implementing Green technology.

Scandlines operates ferry routes between Denmark and Germany. Since 1997, Scandlines has invested in a wide range of technologies and designs—from propellers and hull design to LED lights and heat recovery systems—in an effort to reduce load, fuel consumption and emissions. Since 2012, one of Scandlines’ major focuses has been on using battery-based energy storage systems (ESS) to supply electrical power.

Corvus Energy is Strategic Partner in Hybridization

From the beginning, Scandlines has partnered with Corvus Energy to design the lithium ion battery-based ESSs into the hybrid diesel/battery electric propulsion systems. “Corvus is an important strategic partner in our continued implementation of new technologies to improve the operational efficiencies and reduce the environmental impact of our ferry fleet. Their innovative battery technology enables significant vessel performance improvements in both areas which also supports our ongoing commitment to service excellence,” said Søren Poulsgaard Jensen, Scandlines CEO.

The migration to hybrid ferries has taken place in three stages to date:

  1. 2013 Prinsesse Benedikte – Scandlines’ first hybrid retrofit of a 1997-built passenger and car ferry went into service on the Puttgarden-Rødby route. The 1.6 MWh Corvus battery bank on board is used primarily for low speed in-harbor propulsion, load-levelling, and house power, and can propel the vessel on battery power alone for 20 minutes.
  2. 2014 Deutschland, Prins Richard and Schleswig-Holstein – Three hybridized passenger and car ferries went into service on the Puttgarden-Rødby route. Again, the Corvus battery banks provide low speed in-harbor propulsion, load-levelling, and house power. In addition, Scandlines added exhaust gas scrubbers on all four ferries on the Puttgarden-Rødby route to remove sulphur and particulate matter from the exhaust gas. The combination of reduced fuel consumption and gas scrubbers allowed Scandlines to meet IMO sulphur limits in Sulphur Emission Control Areas (SECAs) by the January 1, 2015 deadline.
  3. 2016 Berlin and Copenhagen are two new-built hybrid 1500-passenger and 480-car ferries, each integrating a 1.5 MWh Corvus battery system into their hybrid diesel/battery electric propulsion systems. The battery systems allow the diesel engines to operate at their most efficient power levels during harbor maneuvering and docking.

 Hybrid propulsion in the four Puttgarden-Rødby ferries has reduced CO2 emissions by up to 15% per crossing, or approximately 15,000 tons CO2 annually.

How Hybrid Propulsion Reduces Fuel Consumption

“Corvus batteries are used primarily to minimize diesel engines running at non‐optimal load,” explained Scandlines’ Hansen. “Further, this means load‐leveling function in order to keep a high level of fuel efficiency and reduced number of generating sets in service.”

Analysis of fuel consumption on Prinsesse Benedikte before and after the installation of Corvus ESS reports a 14.4% reduction in fuel consumption—a significant portion of the 40% reduction in fuel consumption that Scandlines has achieved in almost two decades of fuel efficiency efforts on with the Puttgarden-Rødby ferries.

Here’s a brief review of how Corvus batteries help optimize engine load and impact fuel efficiency:

Specific fuel oil consumption (SFOC) is a measure of marine engine efficiency. It measures the consumption of fuel oil per unit energy at output shaft, typically reported as mass of fuel consumed per hour to produce a KW (g/KWh).

The graph below plots the SFOC on a Mak 8M32 engine, showing grams of heavy fuel oil (HFO) consumed at various engine loads. The graph shows that the engine operates at optimal efficiency at load factors greater than 85%. This is the principle by which hybrid diesel/battery electric propulsion systems can significantly reduce fuel consumption.

 

During a typical crossing, the diesel engines on Scandlines’ non-hybrid ferries would operate at 40%-55% load at sea and only 10% load in ports.

The new hybrid diesel/battery propulsion systems allow the diesel generators to operate more frequently in that sweet spot of high engine efficiency. Vessels run with one diesel genset at 85%-90% load at sea and in ports. While at port, excess energy generated is used to charge the batteries. A second diesel genset may also be used to charge the batteries as needed. At sea, the battery provides the power for load-balancing to allow the diesel generators to operate at a relatively consistent base load. See the illustration below.

Replacing diesel generator with ESS battery bank

How do you convert a diesel electric ferry to a hybrid diesel/battery electric ferry? Scandlines’ Fini Hansen describes it as a simple four step process:

  1. Remove the 85 ton motor
  2. Install 50 tons of batteries
  3. Install the energy storage system (ESS) control system
  4. Integrate into operations

The single line drawing below shows the Corvus ESS in place of the 5th diesel generator.

Certainly, emissions reduction was a major motivation for Scandlines’ investment. Yet there are considerable economic benefits stemming from hybridization of the ferries.

The 14.4% reduction in fuel consumption equates to an impressive annual savings of 1200 KG (1.3 tons) of HFO for Prinsesse Benedikte. In addition, there have been savings in maintenance and lube oil expenses. Annual savings due to hybridization at current fuel prices are approximately 605.000 EUR (710,000 USD) for each of the Puttgarden-Rødby ferries.

Future hybridization projects will reap even higher returns, as technological advancements have improved the performance and reduced the both the size and the cost of latest generation of Corvus Orca ESS, which was released in 2016. Capital outlay for a Corvus ESS, as well as the battery room infrastructure and commissioning cost, has been significantly reduced with the new generation Orca ESS.

Continued Course Towards Greener Ferries

The technology partnership continues. Corvus Energy services and maintains the ESSs in the Scandlines hybrid ferry fleet, taking advantage of its remote condition-based monitoring service, WatchmanTM . Moreover, Corvus continues to assist Scandlines in expanding its hybridization program and moving towards its ambitious zero-emissions goal, which Hansen says Scandlines hopes to accomplish “in a few years”.

“Scandlines is very pleased to continue and expand our long partnership with Corvus Energy. Beginning with Corvus in 2012, their industry leading energy storage technology has become the standard electric battery power solution for all of our hybrid vessels,” said Scandlines’ Hansen. “Our ambition is emission free ferries—we take one nautical mile at a time.”

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5 Reasons why Orca™ is the Perfect Name for Corvus Energy Storage Systems

5 Reasons why Orca™ is the Perfect Name for Corvus Energy Storage Systems

What’s in a name? Branding experts strive for a name that resonates with a product’s characteristics, that is universally understood, and emotes the experience of a user. Here are five similarities between Orca™ Energy Storage Systems (ESS) and majestic Orca whales that make Orca the perfect name for the newest Corvus ESS.

  1. Designed for Life at SeaTM. Resident Orca whales populations are found primarily in the North Pacific and Northeast Atlantic. Yes, these are the same waters in which Corvus Energy’s Orca ESS are increasingly found, with hybrid and all-electric ferries in the waters of Scandinavia, North Europe and British Columbia.

    Many transient and offshore Orca whale pods are known to travel great distances and have adapted to life in open water, similar to the new fleets of hybrid-electric cargo and offshore drilling service vessels being built or retrofitted with Corvus Energy Orca ESS.

Rather than take a single approach, Corvus Energy offers two Orca ESS product lines designed to meet the various needs of maritime customers. Orca Energy is ideal for applications that require large amounts of energy such as ferries and merchant vessels, while Orca Power was designed for applications that require a seamless response to dynamic power loads such as offshore supply vessels and port equipment.

  1. Breach Barriers. Nobody knows for sure why the Orca whale breaches. But one thing is for sure: sightings evoke awe and delight. We are thrilled that the maritime industry is responding similarly to the new Orca ESS product line. The Electric & Hybrid Marine Awards recently honored Corvus Energy with the 2017 ‘Innovation of the Year’

    In presenting the award, judges cited the Orca ESS product line’s enhanced safety, performance and, in particular, unparalleled energy density that results in dramatic drops in upfront and operating costs. With significantly improved ROI, Orca ESS is set to breach the barrier to adoption for many marine applications.

  2. At the Apex. Orca whales are apex predators, meaning that they have no natural predators. Now, we’re not saying that Corvus Energy has no competitors. But John Snyder, editor-in-chief and publisher of Marine Log, may have described Corvus market dominance best when he declared, “It’s hard to find a hybrid or electric marine power project that they don’t have a hand in.”

    Following the successful launch of Orca ESS at the Electric & Hybrid Marine World Expo in 2016, Corvus has won over 30 new projects totalling over 25MWh that will utilize Orca ESS. In total, 100+ projects utilize Corvus ESS, now totalling over 75MWh and 1.5 million operating hours. Corvus has unsurpassed experience and knowledge that enables revolutionary innovation.

  3. Human Safety at Sea. The Orca whale is often maligned as a ‘killer’ whale. The simple truth is that humans are not at risk from Orca whales at sea. Likewise, while doubts still surface about the safety of Li-ion battery systems at sea, these fears are unfounded for well-designed systems such as Corvus Energy’s Orca ESS.

Safety is paramount to the Orca ESS design, with a modular design that improves electrical safety during installation and operation, as well as advanced features to isolate thermal runway at the cell level and vent gas. Orca ESS has been tested and proven to meet or exceed marine safety standards, and Corvus Energy is the only supplier to carry DNV, Lloyd’s Register, ABS and BV product Type Approvals.

  1. Intelligence and Communications. Researchers are still uncovering the extent of social cooperation, vocalization and learned behaviors that indicate a high degree of intelligence in the Orca whale species.

    We draw the fifth parallel in this article to the intelligence and communications capabilities of the Orca ESS condition-based battery monitoring system, Watchman™ ESS advisory portal. Vigilant monitoring of the Orca ESS—from cell level to power system—ensures the system is operating at optimal performance and safety levels.

These are five reasons why Orca is the perfect name for the Corvus Energy Storage Systems. Subscribe to Corvus Energy Updates or Follow Corvus Energy on LinkedIn to keep current on all our news.

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Compact Design and Streamlined Installation Improves ESS Payback

Compact Design and Streamlined Installation Improves ESS Payback

This is the final article in a series highlighting the five remarkable design features incorporated into the Orca™ Energy Storage System (ESS) product line design—a design that earned Corvus Energy the Electric & Hybrid Marine Technology 2017 Innovation of the Year award, as well as the BC TIA Technology Impact Award for Excellence in Product Innovation.

This fifth article describes the sleek, modular design of the Orca ESS that has reduced installation connection and commissioning times by up to 80% and installation costs by up to 50%.

 

Three reasons for faster, less expensive installation
This second generation of Corvus Energy’s highly acclaimed ESS incorporates the learned experiences from over six years of ESS commissioning in over 50 vessels in a variety of maritime environments. The three main reasons for lower installation and commissioning costs are outlined below.

  1. Compact Dimensions: Some of the most significant cost savings stem from a roughly 50% volume reduction and 10% weight reduction in the size of the Orca modules due to significantly higher energy density in the battery. Lower volume means that less space needs to be allocated on the vessel for the battery room.
  2. Safety and Thermal Management: There are typically significant cost savings in setting up the battery room. Higher cell-to-heatsink surface area and improved air flow result in a five-fold improvement in thermal management, which enables an air-cooled system to satisfy most use-cases.Further, Orca ESS has passed the Norwegian Maritime Authority’s (NMA) thermal runaway propagation Test 1—the most stringent test—witnessed by NMA and class society DNV GL. The safety, reliability, performance, and cost-reduction implications are outlined in Safety at Sea is the Top Priority for Corvus Energy Orca ESS.

    As a result, design and commissioning of the battery room and its infrastructure is less costly, with significantly simplified sprinkler, ventilation, and class/flag approvals.

  3. Integration and Factory Testing: Commissioning the Orca system itself is also faster and simplified, reducing installation time by up to 80% or about 1 person-week for a typical 1 MWh system. Much of the savings in field commissioning time comes from the Orca design, in which the power loop is integrated into the rack, along with the battery monitoring communications, so that both can be factory-tested.

In his remarks about awarding Orca ESS the Electric & Hybrid Marine Technology 2017 Innovation of the Year award, awards panel judge Martyn Lasek, editor, Ship & Bunker, said, “Battery technology is at the heart of electric and hybrid marine propulsion technology. Corvus is a true leader in this area.”

Rapid Adoption of Orca ESS
Since its introduction in June 2016, Orca ESS has been selected for over 30 projects totaling over 25 MWh, and the technology will only continue to improve the viability of hybrid and all-electric systems in a greater range of maritime applications.

This concludes the series of articles about what makes Corvus Energy ESS different from all the others. Subscribe to Corvus Energy Updates or Follow Corvus Energy on LinkedIn to receive all articles as they are posted.
View the preceding articles:
Five Remarkable Features of an Award-Winning Marine Energy Storage System,

Safety at Sea is the Top Priority for Corvus Energy Orca ESS,

Energy or Power – Which does your electric or hybrid marine application need?,

High Energy Density is the Key to Economical Electric & Hybrid Energy Storage Systems, and

High ESS Discharge/Charge Rates are Key to Fuel-Efficiency with Variable Loads.

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High ESS Discharge/Charge Rates are Key to Fuel-Efficiency with Variable Loads

High ESS Discharge/Charge Rates are Key to Fuel-Efficiency with Variable Loads

This is the fourth article in a series highlighting the five remarkable design features incorporated into the Orca™ Energy Storage System (ESS) product line design—a design that earned Corvus Energy the Electric & Hybrid Marine Technology 2017 Innovation of the Year award, as well as the BC TIA Technology Impact Award for Excellence in Product Innovation.

The Orca product line consists of two distinct ESS platforms—Orca Energy and Orca Power—each using different battery cell technology with optimized performance characteristics to match high energy demands or high power demands, respectively. In this article, we explore the technology and ideal uses of Orca Power ESS in maritime applications.

Industry’s Highest Discharge Rates
Discharge and charge rates of batteries are specified in a measure called the “C-Rating”. The C-Rating of a battery (or cell) indicates the maximum safe continuous discharge or charge rate. For example, a C-Rating of 10C means it can be discharged at 10 times that pack’s capacity. Continuous and peak C-Ratings are generally specified.

Orca Power ESS can discharge at peak rates of 15C and continuous rates of 10C—rates that simply cannot be attained by any other ESS supplier in the industry.

What are some of the applications that benefit from these high discharge and charge rates? Those with variable loads, says Sean Puchalski, Vice President of Strategic Marketing at Corvus Energy. “The economic benefit of the ESS is derived mostly from load leveling, peak shaving, and spinning reserve. The first two functions in particular are more pronounced in a vessel that must respond to high variation in propulsion loads.”

ESS-Assisted Dynamic Positioning and Peak Shaving Reduces Costs 20-30%
Bjørn-Johan Vartdal, Project Manager at Det Norske Veritas (DNV) agrees that vessels, such as offshore drill platform supply vessels, can benefit from a hybrid-electric system and integrated ESS. “When operating on dynamic positioning, there is a major fuel saving potential. When in harbour, too, the ship should be able to operate on the fuel cell and its battery power alone, which will reduce emissions significantly.”

To maintain the position of the vessel amid wind and waves, thrusters must respond quickly and dynamically. Traditionally, diesel or LNG generators have powered the thrusters, but slow generator ramp rates delay response time. Further, generators are typically sized for peak loads and may often operate in inefficient ranges. Consequently, a hybrid-electric system that can quickly draw high power from an ESS helps to both improve ramp rates and offset peak power demands—a practice known as peak shaving.

The primary benefit of a hybrid system for offshore supply vessels is a 20-30% reduction in fuel consumption and CO2 emissions achieved through smoother and more efficient operation of the generators. Moreover, generators can often be sized smaller to handle base loads as the peak loads will be absorbed by the ESS. So in addition to fuel efficiency, peak shaving may reduce generator running hours and may even negate the need to turn on additional generators.

High C-Rate Means Fast Charging
Let’s not forget that the ESS needs to be charged. Orca Power ESS can charge at peak rates of 13C and continuous rates of 5C, meaning that Orca Power ESS batteries can be quickly charged from shore charging stations and via energy recovery systems.

An example of a shore station ESS that takes advantage of quick discharge/charge using a Corvus ESS is the all-electric Norled ferry, Ampere. The ferry pauses only 10 minutes to unload and load vehicles. The shore ESS at each quay stores energy from the grid and performs a rapid battery-to-battery energy transfers with the on-board ESS while the ferry is docked. The top-up charges the ferry receives after each crossing allows it to make 34 crossing each day before receiving a full charge from the grid overnight.

Due to the quick charge rates, energy can also be recovered and stored in the ESS from port gantry cranes or off-loading equipment on vessels lowering their payload. Again, the high C-Rating means that a significant portion of the potential energy in elevated payloads can be converted into stored energy, further improving energy efficiency and ESS return on investment.

Rapid Adoption of Orca ESS
Whether Orca Power ESS is selected for its high discharge/charge rates and dynamic response, or Orca Energy ESS is selected for its high energy density and low cost per kWh, Orca ESS is a practical and economical solution for an increasing number of marine applications. Since its introduction in June 2016, Orca ESS has been selected for over 30 projects totaling over 25 MWh, and the technology will only continue to improve the viability of our systems in a greater range of maritime applications.

This concludes the fourth in a series of articles about what makes Corvus Energy ESS different from all the others. Subscribe to Corvus Energy Updates or Follow Corvus Energy on LinkedIn to receive all articles as they are posted.

View the preceding articles entitled, Five Remarkable Features of an Award-Winning Marine Energy Storage SystemEnergy or Power – Which does your electric or hybrid marine application need? and High Energy Density is the Key to Economical Electric & Hybrid Energy Storage Systems

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High Energy Density is the Key to Economical Electric & Hybrid Energy Storage Systems

High Energy Density is the Key to Economical Electric & Hybrid Energy Storage Systems

This article is one in a series highlighting the five remarkable design features incorporated into the Orca™ Energy Storage System (ESS) product line design—a design that earned Corvus Energy the Electric & Hybrid Marine Technology 2017 Innovation of the Year award, as well as the BC TIA Technology Impact Award for Excellence in Product Innovation.

The Orca product line consists of two distinct ESS platforms—Orca Energy and Orca Power—each using different battery cell technology with optimized performance characteristics to match high energy demands or high power demands, respectively. In this article, we explore the technology, ideal uses, and three examples of Orca Energy ESS in marine applications.

Unparalleled Energy Density Reduces Cost by 40%
Orca Energy ESS offers a compact design, packing 1.6 MWh in a volume equivalent to a 20 foot shipping container. The key to its compactness is the high energy density of the lithium-ion battery cells in combination with Corvus’ innovative and award-winning battery module and pack designs—energy density that is unparalleled in the industry.

Moreover, the new design resulted in a 40% drop in the cost per kilowatt-hour of stored energy, opening the flood-gates for accelerated adoption of Corvus Energy’s lithium-ion battery energy storage systems.

Longer-Haul Vessels Now Among Ideal Uses
High energy density has made Orca Energy ESS an economically viable energy storage solution for a wide variety of uses. Orca Energy ESS performance is, however, optimized for energy storage uses with relatively constant power loads and discharge rates. As such, the Orca Energy ESS is well suited to electric or hybrid passenger and cargo ferries, tugs, supply vessels, cruise ships, and yachts. Operating at zero or low emissions in harbour and in sensitive marine environments is now more practical and affordable than ever.

Orca Energy ESS is also a viable alternative for spinning reserve, uninterruptible power supply (UPS) or fault ride-through for the entire power system or for subsystems.

Three examples of Reduced Emissions and Fuel Costs:

  1. Viking Princess supply vessel conserves an estimated 1 tonne of fuel per day. Wärtsilä selected Corvus Energy to supply Orca Energy ESS for the retrofit of a second Eidesvik offshore platform supply vessel, the Viking Princess, following the successful retrofit of the Viking Lady. The Viking Princess is a state-of-the-art offshore supply vessel designed to safely service offshore installations in the extremely harsh waters of the North Sea. The 533kWh Orca Energy ESS will be installed on the vessel in a hybrid arrangement. It replaces one LNG genset, approved by DNVGL & NMA as spinning reserve, and will result in one tonne of fuel savings per day.“Corvus Energy, and more specifically the Orca Energy ESS, was selected for its compelling safety, performance and return on investment,” said Dag Håvard Håvardsholm of Wärtsilä. “Based on the innovative approach of Orca and Corvus’ industry leading experience, ship owner Eidesvik has complete trust in this solution.”
  2. Hybrid chemical tanker runs fewer diesel generators. A new hybrid chemical tanker built for Rederiet Stenersen of Norway is the first vessel of its kind to utilize an ESS. Orca Energy ESS integrates with WE Tech Solutions’ hybrid power and propulsion systems, and will allow fewer diesel generators to run for certain operations—improving efficiency, reducing the emissions and lowering noise levels, and making it the most environmentally friendly chemical tanker ship in the Rederiet Stenersen fleet.“Corvus Energy’s industry leadership and experience made our selection of Orca a very straightforward decision,” said Niklas Jakobsson Project Manager at WE Tech. “The innovations Corvus has achieved on cost, safety and performance have created an extremely compelling energy storage solution.”
  3. Polar cruise vessel set for zero emissions. Two new polar expedition cruise vessels are being built for a European expedition cruise operator. Corvus will supply Orca Energy ESS to provide supplemental energy to the vessels in order to improve performance and reduce both operating costs and emissions.Each polar exploration vessel has been outfitted to handle up to 6MWh capacity of Orca Energy ESS to provide operational power. The vessels will be capable of cruising silently and emissions-free on ESS battery power alone into pristine locations, providing its passengers with the experience of exploring some of the world’s most exceptionally beautiful and unspoiled natural surroundings.

Rapid Adoption of Orca Energy ESS
“These latest orders show the viability of energy storage for the hybridization of longer-haul vessels,” said Halvard Hauso, SVP Business Development of Corvus Energy based in Bergen Norway. “As the cost of lithium ion batteries continues to improve we will see more and more applications beyond the traditional ferry and tugboat base.”

Whether Orca Energy is selected for its high energy density and low cost per kWh, or Orca Power is selected for its high discharge/charge rates and dynamic response, Orca ESS a practical and economical solution for an increasing number of marine applications. Since its introduction in June 2016, Orca ESS has been selected for over 30 projects totaling over 25 MWh, and the technology will only continue to improve the viability of our systems in a greater range of maritime applications.

This concludes the third in a series of articles about what makes Corvus Energy ESS different from all the others. Subscribe to Corvus Energy Updates or Follow Corvus Energy on LinkedIn to receive all articles as they are posted.

View the preceding articles: Five Remarkable Features of an Award-Winning Marine Energy Storage System  and Energy or Power – Which does your electric or hybrid marine application need?

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Energy or Power – Corvus Energy Orca™ ESS Product Line Meets Both Differing Demands

Energy or Power – Corvus Energy Orca™ ESS Product Line Meets Both Differing Demands

This is the second article in a series highlighting the five remarkable design features incorporated into Corvus Energy’s Orca™ Energy Storage System (ESS) product line design—a design that earned Corvus Energy the Electric & Hybrid Marine Technology 2017 Innovation of the Year award, as well as the BC TIA Technology Impact Award for Excellence in Product Innovation.

Fundamental to Orca’s design is the recognition that there are multiple uses of ESS systems, and the performance requirements are significantly different depending on its use. “Even among the vessel types that are installing ESS today, there are differing requirements for what the products must do,” explains Sean Puchalski, Vice President at Corvus Energy. “These differences are mostly in terms of whether the vessel needs an ESS that can discharge evenly over an extended period of time (think all-electric ferry) or whether the vessel needs an ESS that can absorb and support large fleeting transient power loads (think offshore supply vessel dynamically positioning next to a drill rig in rough weather).”

The Orca product line consists of two distinct ESS platforms—Orca Energy and Orca Power—each using different battery cell technology with optimized performance characteristics to match high energy demands or high power demands, respectively.

Selecting ESS for High Energy or High Power
Let’s briefly revisit the terms energy and power, which are sometimes used interchangeably … but which are distinctly different. Energy is the “capacity for doing work”, while Power is the “rate of doing work” or the rate at which energy is consumed. The basic unit for energy is the joule (J), while the basic unit of power is the joule per second (J/s), known as the watt (W).

In terms of an ESS for marine vessels, the stored energy or capacity of the ESS is typically measured in kilowatt-hours (kWh) or megawatt-hours (MWh) meaning how much power can be delivered for a specified amount of time.

But, as Puchalski describes, as important for selecting the right ESS is the variability of the load—or demand for power—throughout the vessel’s operation profile and the time that the energy stored in the ESS is being discharged. Is the load relatively constant so that the ESS discharges evenly over time, as in a ferry on a fixed route crossing or an ESS used as battery-backup? Is peak demand intermittent and well above average demand, such as a tug that may spend less than 10% of its time at or near its full bollard pull rating? Or are there transient power loads, such as an offshore supply vessel using thrusters for dynamical positioning to maintain its position next to a drill rig?

Orca Energy ESS is optimized for energy storage uses with a relatively constant power load and discharge rate. It is ideally suited for use with all-electric short haul vessels, and is a viable alternative for spinning reserve, uninterruptible power supply (UPS) or fault ride-through for the entire power system or for subsystems. Due to high energy density, Orca Energy ESS offers a low cost per kWh of stored energy.

Orca Power ESS is an ideal energy source for uses with variable demand. It is designed for seamless response to dynamic power loads, and can deliver power quickly and efficiently to port cranes, charging stations, and offshore supply, exploration and production vessels. Due to extremely high C-ratings, Orca Power ESS offers the industry’s fastest discharge and charge rates.

Economic Benefit Improved with Correct ESS Matching
By correctly matching the appropriate ESS for the operating profile of the vessel and the intended use of the ESS, the economic payback is greatly enhanced—often doubling the return on investment.

In hybrid systems, the primary sources of an ESS’s economic benefit are reduced fuel consumption and lower generator maintenance cost due to efficient operation of fuel-based generators. An ESS can be used for spinning reserve, for instant response to transient loads, and for load balancing through peak shaving and ramping of dynamic loads where there is high variation in propulsion loads. These ESS functions allow generators to run less often and at optimal load for optimum fuel efficiency—resulting in reduced fuel consumption of 15%-75% depending on the application.

Further, the ESS can replace a generator and its associated capital, operating, and maintenance costs when used in fully electric vessels or in hybrid vessels for backup power, including spinning reserve.

Whether Orca Energy is selected for its high energy density and low cost per kWh, or Orca Power is selected for its high discharge/charge rates and dynamic response, Orca ESS is a practical and economical solution for an increasing number of marine applications. Since its introduction in June 2016, Orca ESS has been selected for over two dozen projects totaling over 20MWh, and the technology will only continue to improve the viability of these systems in a greater range of maritime applications.

This concludes the second in a series of articles about what makes Corvus Energy ESS different from all the others. View the preceding introductory article entitled, Five Remarkable Features of an Award-Winning Marine Energy Storage System.

Jump ahead to read the next articles:

High Energy Density is the Key to Economical Electric & Hybrid Energy Storage Systems,

High ESS Discharge/Charge Rates are Key to Fuel-Efficiency with Variable Loads, and

Compact Design and Streamlined Installation Improves ESS Payback.

Subscribe to Corvus Energy Updates or Follow Corvus Energy on LinkedIn to receive all articles as they are posted.

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Safety at Sea is the Top Priority for Corvus Energy Orca™ ESS

Safety at Sea is the Top Priority for Corvus Energy Orca™ ESS

Will safety be compromised as more and more battery vendors and marine propulsion system integrators bid to win a share of the expanding sea of hybrid and electric marine vessels? Corvus Energy, the leader in marine Energy Storage Systems (ESS), has worked hard to achieve the highest standards of safety with its Orca™ ESS, and is the only supplier to carry DNV, Lloyd’s Register, ABS and BV product Type Approvals.

Today is the Day of the Seafarer. In salute to seafarers, and out of intrinsic concern for their safety at sea, we want to review the design practices that Corvus Energy incorporates and the tests we have passed to prove the safety of the Orca™ ESS for hybrid or fully electric propulsion systems.

Geoff Crocker, Director of Product Management & Technical Sales at Corvus Energy, spoke at Nor-Shipping, and David Lokhorst, Corvus Energy’s Vice President of Engineering, spoke at Electric & Hybrid Marine World Expo about the safety features built into the company’s Orca ESS. For those who may have missed the presentations, this article captures the highlights.

The top three technical advancements that improve safety in Corvus Energy’s latest Orca ESS product line are:

  1. Thermal Runaway (TR) Protection
  2. Thermal Management
  3. Electrical Safety and Performance

Thermal Runaway Protection
The best protection from thermal runaway comes from prevention, by selecting a high quality cell manufacturer and designing the battery system with a sophisticated battery monitoring system (BMS), hardware safeties, and good integration with the energy management system (EMS).

However, in the highly unlikely event that a cell fails and its temperature spikes, it is important that adjacent cells do not also experience thermal runaway.

Corvus Energy’s Orca energy storage system design achieves true cell-level thermal runaway isolation, meaning that adjacent cells stay cool without the need for expensive active cooling. Further, The Orca ESS module is designed with internal ventilation pathways to vent gases generated by thermal runaway, and prevent gas from entering the battery room.

Orca ESS passed the NMA’s thermal runaway propagation Test 1—the most stringent test—in September 2016, witnessed by class society DNV GL. The NMA requires tests to verify that when safety systems are deliberately defeated and thermal runaway of a battery module is induced by overcharging, the thermal runaway is limited to a single module and does not spread to other modules in the battery pack. Corvus demonstrated that Orca was designed with a higher level of fault tolerance by eliminating the possibility of thermal runaway spreading to neighbouring cells within a single module.

Thermal Management
The Orca ESS design is optimized for heat-shedding to maintain a uniform temperature across the cell, which enables the cell to operate at its maximum capability. The design incorporates integrated rack fans and active temperature monitoring between cells, which improves reliability and reduces maintenance costs in the long run.

Improved thermal management also means that, typically, air-cooling is all that is required to satisfy marine demands and less battery room infrastructure is needed—both of which reduce system costs.

Orca ESS can also be liquid-cooled in extreme environments and ultra high performance use cases.

Electrical Safety and Performance
The clever and sleek design of the Orca ESS module-and-rack leaves no exposed cables for increased safety during installation and operation. Even the optional air- or liquid-cooling systems are integrated into the rack, resulting in actively cooled connections. Fewer connections, a shorter conductive path, and cooled connections lead to higher reliability and performance, in addition to improving safety.

In addition, safety features incorporated into Orca ESS triggers disconnect at predefined loads, over-voltage or over-temperature. And with voltage isolation of 7.2kV, Orca ESS exceeds Class and Flag standards.

Improved Safety, Better Reliability and Performance, and Lower Cost
While safety is paramount and fundamental to the design of Orca ESS, some of the design features—in particular those for thermal management and electrical safety—also result in overall system cost-savings due to faster installation and lower cost battery room and fire extinguishing system costs. It’s a good Day for a Seafarer when you don’t have to compromise safety for affordability.

This concludes the first in a series of articles about what makes Corvus Energy ESS different from all the others. Subscribe to Corvus Energy Updates or Follow Corvus Energy on LinkedIn to receive all articles as they are posted.

View the preceding introductory article entitled, “Five Remarkable Features of an Award-Winning Marine Energy Storage System

Jump ahead to read the next articles:

Energy or Power – Which does your electric or hybrid marine application need?,

High Energy Density is the Key to Economical Electric & Hybrid Energy Storage Systems,

High ESS Discharge/Charge Rates are Key to Fuel-Efficiency with Variable Loads, and

Compact Design and Streamlined Installation Improves ESS Payback.

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5 Remarkable Features of an Award-Winning Marine ESS

5 Remarkable Features of an Award-Winning Marine ESS

Winning ‘Innovation of the Year’ at the 2017 Electric & Hybrid Marine World Expo, the Corvus Energy lithium-ion-based Orca ™energy storage system (ESS) stands out amongst other ESSs. “Battery technology is at the heart of electric and hybrid marine propulsion technology. Corvus is a true leader in this area,” said awards panel judge Martyn Lasek, editor, Ship & Bunker.

Below are highlights of the five key performance areas in which Corvus Energy’s Orca ESS excel:

  1. Two optimized platforms—Orca Energy and Orca Power. With two design platforms optimized for either high energy or high power, the right ESS characteristics can be matched to the operational profile of each particular application. Often, ESS system costs can be half that of a mismatched system. Learn more…
  2. Unparalleled energy density. Corvus Energy works closely with its battery cell manufacturer to take advantage of cells with extremely high energy density while not compromising safety. Orca Energy offers a compact design packing 1.6 MWh in volume equivalent to a 20’ container. As such, Orca Energy can delivers clean energy capacity at a low cost per kWh improving affordability for electric or hybrid-electric ferries, tug boats, cruise ships, yachts. Learn more…
  3. Highest C-Rate in the industry. Orca Power is designed for seamless response to dynamic power loads, to deliver power quickly and efficiently to port cranes, charging stations, and offshore supply, exploration and production vessels at an attractive $/kW. Orca Power can discharge at peak rates of 15C and continuous rates of 10C, rates that simply cannot be attained by any other ESS supplier in the industry. Learn more…
  4. Ease of installation and commissioning. Considerable design innovation went into making Orca ESS safe and quick to install. Its sleek, modular design has reduced installation connection and commissioning times are reduced by 80% and installation costs by up to 50%. In many cases, there is also significant cost saving in setting up the battery room, with simplified sprinkler, ventilation, and class/flag approvals. Learn more…
  5. Safest in the industry. Corvus Energy is the only supplier to carry DNV, Lloyd’s Register, ABS and BV product Type Approvals and its Orca ESS exceeds Class/Flag standards. Safety features include cell-level thermal runaway isolation, thermal management with remote monitoring capabilities, and improved electrical safety. Learn more…

These are just highlights. In subsequent weeks, we will provide more detail on each of these five topics to help explain why, since the launch of Orca ESS a year ago, Corvus has won over 2 dozen new projects totalling over 15MWh that will utilize Orca ESS.

Subscribe to Corvus Energy Updates or Follow Corvus Energy on LinkedIn to catch all five articles in this series.

Jump ahead to read the articles:

Safety at Sea is the Top Priority for Corvus Energy Orca ESS,

Energy or Power – Which does your electric or hybrid marine application need?,

High Energy Density is the Key to Economical Electric & Hybrid Energy Storage Systems,

High ESS Discharge/Charge Rates are Key to Fuel-Efficiency with Variable Loads, and

Compact Design and Streamlined Installation Improves ESS Payback.

Please follow and like us:
Top hybrid and electric marine propulsion system integrators team up with Corvus Energy for ESS

Top hybrid and electric marine propulsion system integrators team up with Corvus Energy for ESS

On the occasion of being named 2017 Supplier of the Year by Electric & Hybrid Marine Technology journal for the third consecutive year, we at Corvus Energy would like to recognize the companies and the people who specify and integrate Corvus Energy ESS battery systems into their advanced marine propulsion systems.  These designers and executives share our vision of accelerating the shift to environmentally sustainable energy solutions.

Siemens—Leading the greening of the industry, Siemens has supplied propulsion systems for more hybrid and electric vessels than any other integrator. Vessels include Norled, Fjord1 and Scandlines fleet of hybrid ferries, a Norled all-electric ferry, as well as a variety of hybrid tugboat, fishing, and offshore drilling platform supply vessels.
“Siemens is an industry leader in the development of environmentally friendly propulsion technologies. For smaller vessels, we have developed BlueDrive PlusC, an extremely flexible, compact and high-capacity electric hybrid propulsion system which is designed to provide maximum efficiency. When integrated with a Corvus lithium ESS we can nearly eliminate all emissions.”
Ole Johan Hungnes, Sales Manager, Siemens Marine

Wärtsilä—Wärtsilä provided the propulsion systems for Norled’s full-electric ferry, Fogelfonn, and is currently retrofitting their second Eidesvik Offshore drilling platform supply vessel.
“Corvus Energy, and more specifically the Orca Energy ESS, was selected for its compelling safety, performance and return on investment. Based on the innovative approach of Orca and Corvus’ industry leading experience, ship owner Eidesvik has complete trust in this solution.”
Dag Håvard Håvardsholm, Wärtsilä

Elkon—Elkon of Turkey has provided the propulsion systems used in two Seaspan hybrid cargo ferries in British Columbia, Canada.
“Integrating the proven Corvus ESS technology into our new LNG-battery vessels will help us achieve our goal of minimizing the environmental impact of our operations, while reducing fuel consumption and operating costs. Corvus’ experience, industry leadership and safety record made it an easy decision to utilize their battery systems.”
Jonathan Whitworth, CEO, Seaspan

Aspin Kemp & Associates—Applied in hybrid tugboats and dive support vessels, Aspin Kemp & Associates has integrated Corvus Energy ESS into its hybrid propulsion systems.
“XeroPoint hybrid has been proven to offer significant benefits. The diesel-electric system illustrates our ability to allow the operator to configure their power plant based on their specific operational requirements, ultimately resulting in improved performance and safety.”
John Eldridge, Hybrid Project Manager, Aspin Kemp & Associates

BAE Systems—BAE Systems is supplying their HybriDrive Propulsion System in a 500-passenger tour boat, a hybrid catamaran dive platform and research lab, and a 132-foot Brigantine Tall Ship.
“Our ongoing collaboration with Corvus Energy adds significant value to our hybrid system programs, and we look forward to continuing that work.”
Yesh Premkumar, Project Manager of Fuel Cell and Maritime Programs, BAE Systems

Ingeteam—Ingeteam provided the propulsion system for Dutch operator TESO’s hybrid ferry.
“TESO’s investment shows our ongoing commitment to increasing efficiency in our systems. These efficiencies will not only benefit the company and customers in terms of reduced costs, but also the environment in terms of reduced emissions.”
Cees de Waal, Directeur, TESO

Halvorsen Power Systems—Halvorsen is taking the lead on the retrofit of a Norwegian marine research vessel.
“The Orca Energy ESS from Corvus was an extremely compelling solution for this application. By combining industry leading safety, performance and economic feasibility, Corvus has achieved the ultimate maritime ESS and we really enjoy working closely with the skilled and enthusiastic Corvus team.”
Hans Petter Heggebø, CEO, Halvorsen Power Systems

General Electric— GE’s Power Conversion business has built a marine power test facility and customer demonstration center that integrates  GE technologies and the Orca ESS from Corvus Energy, for merchant, naval and offshore applications.
“GE selected Corvus after a rigorous evaluation process, based on their superior safety, functionality and advanced design. We look forward to utilizing the Orca ESS to add significant value to our hybrid systems in our marine and other markets and to demonstrating it to our customers in our new customer demonstration center.”
Jon Childs, GE Marine Application Engineering

ACEL—The Norwegian integrator is doing testing across multiple maritime applications.
“ACEL selected Corvus based on their innovative leadership in the marine ESS market which is proven by the performance capabilities, safety and design of their new Orca ESS. We look forward to utilizing the Orca ESS to add significant value to our marine projects well into the future.”
Hans-Tore Jenssen, Department Manager Power System,  ACEL

CCCC Shanghai Equipment Engineering (CCCCSEE)—In a related maritime application, CCCCSEE has integrated Corvus Energy ESS into hybrid RTG port cranes for Shanghai’s Zhenhua Heavy Industry Co. (“ZPMC”), the world’s largest port crane manufacturer.
“CCCCSEE continues its corporate vision of industry leading engineering excellence with the advanced integration of energy storage technology to our port operations infrastructure, and Corvus technology is a cornerstone of this strategy. Corvus battery systems deployed last year have met and exceeded expectations in performance and cost savings. The proven performance, durability and reliability of its battery systems is ideally suited for the demands of our industrial applications.”
Gao Jianzhong, Chief Engineer, CCCCSEE

We have also had the pleasure of working with numerous other industry leaders, and look forward to telling you about many more projects in the future. Subscribe to Corvus Energy Updates or Follow Corvus Energy on LinkedIn for all the latest news.

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